Downey Weather in May
Average highs run from 75°F on May 1 to 77°F on May 31, and lows from 55°F to 60°F. Normal precipitation for the month is 0.48 in over about 2 wet days.
May day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
May at a glance
- Average high
- 76°F
- Average low
- 58°F
- Precipitation
- 0.48 in
- Record high
- 104°FMay 3, 2004
- Record low
- 40°FMay 7, 1964
- Chance of a freeze
- 0%
- Days of 90°F or more
- 3.7
- Daylight
- 13 h 33 min to 14 h 15 min
- Cloud cover
- 26%
- Humidity
- 63%
- Dew point
- 48°F
- Wind
- 6.3 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| May 1 | 75°F | 55°F | 94°F 2014 | 42°F 1967 | 7% |
| May 2 | 75°F | 55°F | 102°F 2004 | 45°F 1964 | 7% |
| May 3 | 75°F | 55°F | 104°F 2004 | 46°F 1955 | 7% |
| May 4 | 75°F | 56°F | 92°F 1990 | 48°F 1959 | 7% |
| May 5 | 75°F | 56°F | 102°F 1990 | 46°F 1950 | 7% |
| May 6 | 75°F | 56°F | 100°F 1990 | 46°F 1950 | 7% |
| May 7 | 75°F | 56°F | 97°F 2007 | 40°F 1964 | 7% |
| May 8 | 75°F | 56°F | 98°F 2007 | 44°F 1950 | 6% |
| May 9 | 75°F | 57°F | 93°F 1993 | 46°F 1950 | 6% |
| May 10 | 75°F | 57°F | 95°F 2025 | 49°F 1953 | 6% |
| May 11 | 75°F | 57°F | 93°F 1996 | 48°F 1967 | 6% |
| May 12 | 75°F | 57°F | 97°F 1979 | 48°F 1951 | 6% |
| May 13 | 75°F | 57°F | 101°F 1979 | 48°F 1956 | 6% |
| May 14 | 75°F | 58°F | 101°F 2014 | 48°F 1968 | 6% |
| May 15 | 75°F | 58°F | 101°F 2014 | 47°F 1962 | 6% |
| May 16 | 75°F | 58°F | 103°F 1967 | 47°F 1955 | 6% |
| May 17 | 76°F | 58°F | 93°F 2008 | 47°F 1962 | 6% |
| May 18 | 76°F | 58°F | 92°F 1978 | 49°F 1974 | 6% |
| May 19 | 76°F | 58°F | 89°F 2008 | 48°F 1950 | 6% |
| May 20 | 76°F | 58°F | 93°F 2017 | 48°F 1949 | 6% |
| May 21 | 76°F | 59°F | 87°F 2003 | 48°F 1962 | 5% |
| May 22 | 76°F | 59°F | 89°F 1967 | 48°F 1962 | 5% |
| May 23 | 76°F | 59°F | 88°F 1949 | 46°F 1960 | 5% |
| May 24 | 76°F | 59°F | 87°F 2021 | 48°F 1953 | 5% |
| May 25 | 76°F | 59°F | 91°F 1974 | 47°F 1953 | 5% |
| May 26 | 76°F | 59°F | 93°F 1968 | 48°F 1953 | 5% |
| May 27 | 77°F | 59°F | 91°F 1973 | 49°F 1953 | 5% |
| May 28 | 77°F | 59°F | 100°F 1973 | 47°F 1962 | 4% |
| May 29 | 77°F | 59°F | 99°F 1978 | 47°F 1953 | 4% |
| May 30 | 77°F | 60°F | 92°F 2025 | 50°F 1953 | 4% |
| May 31 | 77°F | 60°F | 88°F 1972 | 50°F 1949 | 4% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (PDT).
- May 1
- sunrise 6:03 AM, sunset 7:36 PM
- May 31
- sunrise 5:43 AM, sunset 7:58 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00047785 (San Gabriel Fire Dept), public domain. Records: NOAA GHCN-Daily, station USW00023129, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.